Medulloblastoma most common metastasis is to ?
**Core Concept**
Medulloblastoma is a highly malignant primary brain tumor that originates in the cerebellum or posterior fossa. It is the most common type of malignant brain tumor in children, with a propensity for metastasis to distant sites.
**Why the Correct Answer is Right**
Medulloblastoma spreads through the cerebrospinal fluid (CSF) and can metastasize to the spinal cord, brainstem, and other parts of the central nervous system. The most common site of metastasis is the spinal cord, particularly the cervical and thoracic regions, due to the flow of CSF through the subarachnoid space.
**Why Each Wrong Option is Incorrect**
**Option A:** The lungs are not a common site of metastasis for medulloblastoma, as it primarily spreads through the CSF rather than the bloodstream.
**Option B:** The liver is not typically involved in the metastatic spread of medulloblastoma, which primarily affects the central nervous system.
**Option C:** The adrenal glands are not a common site of metastasis for medulloblastoma, which is more likely to spread to the spinal cord and other intracranial structures.
**Clinical Pearl / High-Yield Fact**
When managing medulloblastoma, it is essential to consider the risk of spinal cord metastasis and incorporate spinal imaging as part of the initial diagnostic workup and follow-up surveillance.
**Correct Answer:** D. Spinal cord.